Remove a DIMM
DIMMs can be serviced by customers. You must remove the CMIOU from the CMIOU
chassis to access the DIMMs.
Do not mix 32GB LRDIMMs (4R x 4Gb) and 32GB RDIMMs (2R x 8Gb) in the same
CMIOU. If you are replacing LRDIMMs with RDIMMs, replace all of the DIMMs in the
Before beginning this procedure, ensure that you are familiar with the
cautions and safety instructions described in Safety Information and the information in DIMM Configuration.
When a DIMM fails, do not remove the DIMM until a replacement is available.
Removing a faulted DIMM and leaving the slot empty might deconfigure the
Take the necessary ESD precautions.
See Prevent ESD Damage.
If you are replacing a faulty DIMM, determine which DIMM needs to be
This task involves removing the CMIOU and its cover.
See Determine Which DIMM Is Faulty (LEDs).
Remove the DIMM.
Use caution when pressing the DIMM ejector latch to ensure that you do not
come into contact with the adjacent DCDC power board. Doing so might loosen,
or otherwise adversely impact, the DCDC board, causing the server to report
Push down on the ejector tabs on both sides of the DIMM until the DIMM
DIMMs and heat sinks on the motherboard might be hot.
Grasp the top corners of the faulty DIMM, lift it out of its slot, and
place it on a grounded antistatic mat.
Repeat the previous step for any other DIMMs that you need to remove.
Determine your next step.